PeaweevilsÂ are small, brown to gray beetle about 3-5mm long with long markings on their backs. They have wings and can fly to nearby plants.Â
Adult Pea weevil (left)-University of Idaho, Adults emerging from peas (right)-South Australian Research & Development Institute
The larvae are cream coloured and about 3mm long. Eggs are small, thin and yellow.
Eggs on pods (left), Larvae (all stages) (right)-photos South Australian Research & Development Institute
Habitat & Lifecycle
They are found in Canada, United States, South America and Australia. They overwinter as adults with the peas, in your storage bin or pea debris left in the garden. In the spring they lay their yellow eggs on the pea pods. Once the eggs hatch the larvae bores a hole into the pod and feed on the peas. They pupate in the summer inside a pea and hatch into the weevil. They can hatch in your storaged bins as well.
Lifecycle-photo University of Illinois
Diet & Damage
They eat peas, broad beans, alfalfa and clover. The adults feed on leaves cutting out notchlike holes on the edges. Sometimes damage is hard to see. Larvae work their way into the pods and eat the peas inside.
1) Hand Pick
Pick the adult weevils from the peas in the early evening. Crush the eggs as you find them on the pods.
2) Plant Wisely
Don’t plant peas near alfalfa or clover since pea weevils are often found among these plants. Plant peas as early as possible to avoid these guys. Peas are a cool weather crop so most can avoid pea weevil infestation.
3) Grow Healty Plants
Plants can usually outgrow these pests if they are healthy and are growing vigorously. If you do find an outbreak remove all the affected plants and burn them.
There are some insect eating birds that eat them. Put bird baths in or around your garden.
5) Biological Insecticides
Rotenone or insecticidal soap sprays.